#! /usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright 2020 Alibaba Group Holding Limited.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

import logging
from abc import ABCMeta
from abc import abstractmethod

logger = logging.getLogger("graphscope")


class Launcher(metaclass=ABCMeta):
    """
    Base Class to derive KubernetesClusterLauncher and HostsClusterLauncher.
    """

    def __init__(self):
        self._coordinator_endpoint = None

    @property
    def coordinator_endpoint(self):
        if self._coordinator_endpoint is None:
            raise RuntimeError("Get None value of coordinator endpoint.")
        return str(self._coordinator_endpoint)

    @abstractmethod
    def type(self):
        pass

    @abstractmethod
    def start(self):
        pass

    @abstractmethod
    def stop(self, wait=False):
        pass

    @abstractmethod
    def poll(self):
        pass
